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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 741 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.19² =
  2. 2.15² =
  3. 3.22² =
  4. 4.17² =
  5. 5.12² =
  6. 6.11² =
  7. 7.24² =
  8. 8.28² =
  9. 9.27² =
  10. 10.21² =
  11. 11.29² =
  12. 12.26² =
  13. 13.25² =
  14. 14.16² =
  15. 15.13² =
  16. 16.14² =
  17. 17.18² =
  18. 18.23² =
  19. 19.25² =
  20. 20.14² =
  21. 21.16² =
  22. 22.26² =
  23. 23.15² =
  24. 24.28² =
  25. 25.25² =
  26. 26.17² =
  27. 27.22² =
  28. 28.15² =
  29. 29.22² =
  30. 30.18² =
  31. 31.11² =
  32. 32.18² =
  33. 33.11² =
  34. 34.23² =
  35. 35.15² =
  36. 36.21² =
  37. 37.23² =
  38. 38.18² =
  39. 39.22² =
  40. 40.26² =

Answer key

  1. 361
  2. 225
  3. 484
  4. 289
  5. 144
  6. 121
  7. 576
  8. 784
  9. 729
  10. 441
  11. 841
  12. 676
  13. 625
  14. 256
  15. 169
  16. 196
  17. 324
  18. 529
  19. 625
  20. 196
  21. 256
  22. 676
  23. 225
  24. 784
  25. 625
  26. 289
  27. 484
  28. 225
  29. 484
  30. 324
  31. 121
  32. 324
  33. 121
  34. 529
  35. 225
  36. 441
  37. 529
  38. 324
  39. 484
  40. 676

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